Valley Sports has budgeted sales for June, July, and August of $10,000, $12,000, and $15,000, respectively. Average cost of inventory is 60% of the selling price. Valley's inventory guidelines are to have 70% of the next month's cost of sales in inventory at the end of each month. July budgeted purchases are: A. $5,100 B. $8,460 C. $15,500 D. Need more information to